论文标题
合作轨道时刻和边缘磁静力
Cooperative orbital moments and edge magnetoresistance in monolayer WTe$_2$
论文作者
论文摘要
我们认为，单层WTE $ _2 $中的Edge电子可以拥有一个“合作”轨道力矩（COM），该轨道矩（COM）严重影响其边缘磁势行为。 COM是由Rashba和Ising旋转轨道耦合的合作作用引起的，即使是相对较小的自旋轨道耦合强度，也很快就达到了很大的幅度（几乎没有Bohr Magneton）。正如我们所解释的那样，如此大的COM大小是由Rashba和Ising Spin Orbit耦合在一起的非常规的旋转的非常规合作旋转的。令人惊讶的是，COM可以与旋转力矩竞争，以产生以倾斜角度定向的异常各向异性边缘磁力。特别是，该竞赛产生了一个方向，$ \ mathbf {b} $在扩大边缘频谱方面无效，几乎无间隙。结果，差距大小的大对比度表现为$ \ mathbf {b} $旋转授予在10 t和低温下的巨大各向异性磁势率为0.1-100万％。
We argue that edge electrons in monolayer WTe$_2$ can possess a "cooperative" orbital moment (COM) that critically impacts its edge magnetoresistance behavior. Arising from the cooperative action of both Rashba and Ising spin orbit coupling, COM quickly achieves large magnitudes (of order few Bohr magnetons) even for relatively small spin-orbit coupling strengths. As we explain, such large COM magnitudes arise from an unconventional cooperative spin canting of edge spins when Rashba and Ising spin orbit coupling act together. Strikingly, COM can compete with spin moments to produce an unusual anisotropic edge magnetoresistance oriented at an oblique angle. In particular, this competition produces a direction along which $\mathbf{B}$ is ineffective at gapping out the edge spectrum leaving it nearly gapless. As a result, large contrasts in gap sizes manifest as $\mathbf{B}$ is rotated granting giant anisotropic magnetoresistance of 0.1-10 million % at 10 T and low temperature.
